Question

The area of rectangle gets reduced by 80 sq units if it's length is reduced by 5 units and breadth is increased by 2 units. If length is increased by 10 units and breadth is increased by 5 units the area will be increase by 50 sq. Units, then
A) length =40units
B) breadth =30units
C) length =45 units
D) length =35units

Answer 1

Answer:-

your question is wrong according to answer it seems in second case breadth should be decreased by 5 units then only u will get the answer then the answer will be length =40 units

Step-by-step explanation:

1st case:-

lb-80=(l-5)(b+2)

lb-80=lb+2l-5b-10

lb-lb-2l+5b =80-10

5b-2l=70................... (1)

2nd case:-

lb+50=(l+10)(b-5)

lb+50=lb-5l+10b-50

50+50=lb-lb-5l+10b

100=10b-5l..................(2)

solving 1 & 2

length =40 units &

breadth= 30 units

Answer 2

length=40 breadth=30